[单选题]电气设备全部或部分停电的作业，应在作业地点悬挂（）的安全标志牌。
A.禁止出入
B.有人工作
C.在此工作
D.高压危险

[单项选择]甲某遭到乙某等三人的无端殴打，并被乙某用刮刀刺伤。甲某急忙夺路跑走，此时，乙某等人高呼：“抓小偷!”路人李某不明真相，上前抓住甲某。甲某一时难以挣脱，不得已刺伤李某，得以脱身。事后查明，甲某被乙谋刺成重伤，甲某给李某造成轻伤害。甲某的行为：
A. 属于紧急避险，不负刑事责任
B. 属于避险过当，应当负刑事责任
C. 属于假想防卫，意外事件，不负刑事责任
D. 属于正当防卫，不负刑事责任

[判断题]吊板作业时，横向移动的最大距离，为作业者为中心左右不大于20cm。(　　)
A.正确
B.错误

[判断题]关门车不得挂于机车后部3辆车之内（ ）。
A.正确
B.错误

[填空题]

[听力原文]11-15
When you take a walk in any of the cities in the West, you often see a lot of people walking dogs. It is still true that dog is the most useful and faithful animal in the world, but the reasons why people keep a dog have changed. In the old days people used to train dogs to protect themselves against attacks by other beats. And later they came to realize that a dog was not only useful for protection but willing to obey his master. For example, when people used dogs for hunting, the dogs would not eat what was caught without permission. But now people in the city need not protect themselves against attacks of animals. Why do they keep dogs, then Some people keep dogs to protect themselves from robbery. But the most important reason is for companionship. For a child, a dog is his best friend when he has no friends to play with. For young couples, a dog is their child when they have no child. For old couples, a dog is al so their child when their real children ha

[单选题]在作业现场中（ ）依靠嗅觉是否闻到硫化氢的气味来判断有没有硫化氢的存在。
A.不能
B.能
C.低浓度可以
D.高浓度能

[多项选择]男，30岁，Ⅱ°烧伤面积60％，经积极补充血容量，为判断其休克是否好转，下列哪些观察是可靠的
A. 红细胞压积
B. 每小时尿量
C. 肢体微循环状态
D. 中心静脉压
E. 血压是否升高

[判断题]调车机车一般设有双司机室。
A.正确
B.错误

[单项选择]以下关于桩外形的描述，正确的是（）
A. 直径为根径的1/2
B. 卵圆形
C. 与根管壁不宜太密合
D. 与根部外形一致
E. 一般为平行的圆柱状